{"id":30623,"date":"2019-10-31T21:36:34","date_gmt":"2019-10-31T18:36:34","guid":{"rendered":"https:\/\/prohoster.info\/blog\/klasternoe-hranilishhe-dlya-nebolshih-web-klasterov-na-baze-drbd-ocfs2\/"},"modified":"2019-10-31T21:36:34","modified_gmt":"2019-10-31T18:36:34","slug":"klasternoe-hranilishhe-dlya-nebolshih-web-klasterov-na-baze-drbd-ocfs2","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/administrirovanie\/klasternoe-hranilishhe-dlya-nebolshih-web-klasterov-na-baze-drbd-ocfs2","title":{"rendered":"Archiviazione cluster per piccoli cluster web basati su drbd+ocfs2","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><b>Di cosa parleremo:<\/b><br \/>\nCome implementare rapidamente uno storage condiviso per due server utilizzando soluzioni drbd+ocfs2. <\/p>\n<p><b>A chi sar\u00e0 utile:<\/b><br \/>\nQuesto tutorial sar\u00e0 utile per gli amministratori di sistema e chiunque stia considerando un modo per implementare lo storage o desideri provare una soluzione.<\/p>\n<h3>Quali soluzioni abbiamo scartato e perch\u00e9<\/h3>\n<p>\nSpesso ci troviamo nella situazione in cui \u00e8 necessario implementare uno storage condiviso su un piccolo web cluster con buone performance di lettura e scrittura. Abbiamo provato diverse opzioni per implementare lo storage condiviso nei nostri progetti, ma poche sono state in grado di soddisfarci su pi\u00f9 fronti. Ora vi spiegheremo perch\u00e9.<\/p>\n<ul>\n<li>Glusterfs non ci ha convinto per le performance di lettura e scrittura; abbiamo riscontrato problemi nella lettura simultanea di un numero elevato di file, con un carico CPU elevato. Il problema della lettura dei file poteva essere risolto accedendo direttamente ai brick, ma non sempre \u00e8 applicabile e in generale non \u00e8 corretto. <\/li>\n<\/ul>\n<p><\/p>\n<ul>\n<li>Ceph non ci \u00e8 piaciuto per la complessit\u00e0 eccessiva, che pu\u00f2 essere dannosa per progetti con 2-4 <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/it\/server\/dts-dusseldorf\/\"   title=\"server\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"3413\">server<\/a>, specialmente se il progetto viene poi gestito. Ci sono, comunque, seri limiti di prestazioni che obbligano a costruire cluster di storage separati, proprio come con glusterfs. <\/li>\n<\/ul>\n<p><\/p>\n<ul>\n<li>L'utilizzo di un singolo server NFS per la realizzazione di uno storage condiviso solleva interrogativi sulla resilienza. <\/li>\n<\/ul>\n<p><\/p>\n<ul>\n<li> S3 \u00e8 una soluzione molto popolare per una certa gamma di compiti, ma non \u00e8 un file system, il che ne limita l'applicazione.<\/li>\n<\/ul>\n<p><noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<ul>\n<li>Lsyncd. Se stiamo parlando di \"non-file system\", merita menzione questa soluzione popolare. Non solo non \u00e8 adatta per la sincronizzazione bidirezionale (ma se proprio si desidera, \u00e8 possibile), ma non funziona nemmeno in modo stabile con un gran numero di file. Inoltre, \u00e8 un processo a thread singolo. Questo \u00e8 dovuto all'architettura del programma: utilizza inotify per monitorare gli oggetti di lavoro, che vengono attivati all'avvio e durante la riscanificazione. Per il trasferimento viene utilizzato rsync. <\/li>\n<\/ul>\n<p><\/p>\n<h3>Tutorial: come implementare uno storage condiviso basato su drbd+ocfs2<\/h3>\n<p>\nUna delle soluzioni pi\u00f9 convenienti per noi \u00e8 stata la combinazione <b>ocfs2+drbd<\/b>. Ora vi racconteremo come impostare rapidamente uno storage condiviso per due <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/it\/server\/\"   title=\"server\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"1291\">server<\/a> basato su soluzioni database. Ma prima alcune informazioni sui componenti:<\/p>\n<p><b>DRBD<\/b> \u00e8 un sistema di storage incluso nella distribuzione standard di Linux, che consente di replicare i dati tra i server a blocchi. Il suo uso principale \u00e8 nella costruzione di archiviazioni ad alta disponibilit\u00e0.<\/p>\n<p><b>OCFS2<\/b> \u00e8 un file system che consente l'uso condiviso dello stesso storage da pi\u00f9 sistemi. \u00c8 incluso nella distribuzione di Linux e consiste in un modulo del kernel e strumenti userspace per lavorare con il file system. OCFS2 pu\u00f2 essere utilizzato non solo sopra DRBD, ma anche sopra iSCSI con connessione multipla. Nel nostro esempio utilizziamo DRBD.<\/p>\n<p>Tutte le operazioni vengono eseguite su ubuntu server 18.04 in configurazione minima.<\/p>\n<p><b>Passo 1. Configuriamo DRBD:<br \/>\n<\/b><br \/>\nNel file \/etc\/drbd.d\/drbd0.res descriviamo il nostro dispositivo di blocco virtuale \/dev\/drbd0:<\/p>\n<pre><code class=\"plaintext\">risorsa drbd0 {\n    syncer { rate 1000M; }\n    net {\n        allow-two-primaries;\n        after-sb-0pri discard-zero-changes;\n        after-sb-1pri discard-secondary;\n        after-sb-2pri disconnect;\n    }\n    startup { become-primary-on both; }\n    on drbd1 {\n        meta-disk internal;\n        device \/dev\/drbd0;\n        disk \/dev\/vdb1;\n        address 10.10.10.192:7789;\n}\n    on drbd2 {\n        meta-disk internal;\n        device \/dev\/drbd0;\n        disk \/dev\/vdb1;\n        address 10.10.10.193:7789;\n}\n}<\/code><\/pre>\n<p>\n<i>meta-disk interno<\/i> \u2014 usare gli stessi dispositivi a blocchi per la memorizzazione dei metadati<br \/>\n<i>device \/dev\/drbd0<\/i> \u2014 usare \/dev\/drbd0 come percorso per drbd.<br \/>\n<i>disk \/dev\/vdb1<\/i> \u2014 usare \/dev\/vdb1 <br \/>\n<i>syncer { rate 1000M; }<\/i> \u2014 utilizzare un gigabit di larghezza di banda della rete<br \/>\n<i>allow-two-primaries<\/i> \u2014 un'opzione importante che consente di accettare modifiche su due server primari<br \/>\n<i>after-sb-0pri, after-sb-1pri, after-sb-2pri<\/i> \u2014 opzioni che determinano le azioni del nodo in caso di split-brain. Maggiori informazioni possono essere trovate nella documentazione.<br \/>\n<i>become-primary-on both<\/i> \u2014 imposta entrambi i nodi come primari.<\/p>\n<p>Nel nostro caso, abbiamo due VM identiche, con una rete virtuale dedicata di larghezza di banda di 10 gigabit.<\/p>\n<p>Nel nostro esempio, i nomi di rete dei due nodi del cluster sono drbd1 e drbd2. Per il funzionamento corretto, \u00e8 necessario mappare i nomi e gli indirizzi IP dei nodi in \/etc\/hosts.<\/p>\n<pre><code class=\"bash\">10.10.10.192 drbd1\n10.10.10.193 drbd2<\/code><\/pre>\n<p>\n<b>Passo 2. Configuriamo i nodi:<\/b><\/p>\n<p>Eseguiamo su entrambi i server:<\/p>\n<pre><code class=\"bash\">drbdadm crea-md drbd0<\/code><\/pre>\n<p>\n<img decoding=\"async\" alt=\"Archiviazione cluster per piccoli cluster web basati su drbd+ocfs2\" src=\"\/wp-content\/uploads\/2019\/03\/38b0a4a4fc60ac617abfad6e8f755ae7.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<\/p>\n<pre><code class=\"bash\">modprobe drbd\ndrbdadm up drbd0\ncat \/proc\/drbd<\/code><\/pre>\n<p>\nOtteniamo il seguente:<\/p>\n<p><img decoding=\"async\" alt=\"Archiviazione cluster per piccoli cluster web basati su drbd+ocfs2\" src=\"\/wp-content\/uploads\/2019\/03\/91c48ed32cd1471e4076934d041966d8.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n\u00c8 possibile avviare la sincronizzazione. Sulla prima nodo \u00e8 necessario eseguire:<\/p>\n<pre><code class=\"bash\">drbdadm primary --force drbd0<\/code><\/pre>\n<p>\nControlliamo lo stato:<\/p>\n<pre><code class=\"bash\">cat \/proc\/drbd<\/code><\/pre>\n<p>\n<img decoding=\"async\" alt=\"Archiviazione cluster per piccoli cluster web basati su drbd+ocfs2\" src=\"\/wp-content\/uploads\/2019\/03\/b94b54b1050595bec774adf6c5190968.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nOttimo, \u00e8 iniziata la sincronizzazione. Aspettiamo la fine e visualizziamo la situazione:<\/p>\n<p><img decoding=\"async\" alt=\"Archiviazione cluster per piccoli cluster web basati su drbd+ocfs2\" src=\"\/wp-content\/uploads\/2019\/03\/7f9e2d3664d3a578c74e72b8bc4c1a7f.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n<b>Passo 3. Avviamo la sincronizzazione sul secondo nodo:<\/b><\/p>\n<pre><code class=\"bash\">drbdadm primary --force drbd0\n<\/code><\/pre>\n<p>\nOtteniamo il seguente:<\/p>\n<p><img decoding=\"async\" alt=\"Archiviazione cluster per piccoli cluster web basati su drbd+ocfs2\" src=\"\/wp-content\/uploads\/2019\/03\/ad3d616ca84fa26a18574f433bb7d9fe.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nOra possiamo scrivere in drbd da entrambi i server.<\/p>\n<p><b>Passo 4. Installazione e configurazione di ocfs2.<\/b><\/p>\n<p>Utilizzeremo una configurazione piuttosto banale:<\/p>\n<pre><code class=\"plaintext\">cluster:\n     node_count = 2\n     name = ocfs2cluster\n\nnode:\n     number = 1\n     cluster = ocfs2cluster\n     ip_port = 7777\n     ip_address = 10.10.10.192\n     name = drbd1\n\nnode:\n     number = 2\n     cluster = ocfs2cluster\n     ip_port = 7777\n     ip_address = 10.10.10.193\n     name = drbd2\n<\/code><\/pre>\n<p>\nDeve essere registrata in <i>\/etc\/ocfs2\/cluster.conf<\/i> su entrambi i nodi.<\/p>\n<p>Creiamo un FS su drbd0 su un nodo qualsiasi:<\/p>\n<pre><code class=\"bash\">mkfs.ocfs2 -L \"testVol\" \/dev\/drbd0\n<\/code><\/pre>\n<p>\nQui abbiamo creato un FS con etichetta testVol su drbd0, utilizzando i parametri predefiniti.<\/p>\n<p><img decoding=\"async\" alt=\"Archiviazione cluster per piccoli cluster web basati su drbd+ocfs2\" src=\"\/wp-content\/uploads\/2019\/03\/d147b91ca6f39d846023d8b5c35a240e.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nIn \/etc\/default\/o2cb \u00e8 necessario impostare (come nel nostro file di configurazione)<\/p>\n<pre><code class=\"bash\">O2CB_ENABLED=true \nO2CB_BOOTCLUSTER=ocfs2cluster <\/code><\/pre>\n<p>\ne eseguire su ciascun nodo:<\/p>\n<pre><code class=\"bash\">o2cb register-cluster ocfs2cluster<\/code><\/pre>\n<p>\nDopo di che accendiamo e aggiungiamo all'avvio automatico tutte le unit\u00e0 necessarie:<\/p>\n<pre><code class=\"bash\">systemctl enable drbd o2cb ocfs2\nsystemctl start drbd o2cb ocfs2<\/code><\/pre>\n<p>\nParte di questo sar\u00e0 gi\u00e0 avviata durante la configurazione.<\/p>\n<p><b>Passo 5. Aggiungiamo i punti di montaggio in fstab su entrambi i nodi:<\/b><\/p>\n<pre><code class=\"bash\">\/dev\/drbd0 \/media\/shared ocfs2 defaults,noauto,heartbeat=local 0 0<\/code><\/pre>\n<p>\nDirectory <i>\/media\/shared<\/i> a questo punto deve essere creato in anticipo.<\/p>\n<p>Qui utilizziamo le opzioni noauto, che significano che il FS non verr\u00e0 montato all'avvio (preferisco montare i file system di rete tramite systemd) e heartbeat=local, che significa utilizzare il servizio heartbeat su ciascun nodo. Esiste anche il heartbeat globale, pi\u00f9 adatto per grandi cluster.<\/p>\n<p>Successivamente, possiamo montare <i>\/media\/shared<\/i> e controllare la sincronizzazione dei contenuti.<\/p>\n<p><b>Fatto!<\/b> Il risultato \u00e8 uno storage abbastanza resiliente, con possibilit\u00e0 di scalabilit\u00e0 e buone prestazioni.<br \/>\n<br \/>Fonte: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/445612\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041e \u0447\u0435\u043c \u043c\u044b \u0440\u0430\u0441\u0441\u043a\u0430\u0436\u0435\u043c: \u041a\u0430\u043a \u0431\u044b\u0441\u0442\u0440\u043e \u0440\u0430\u0437\u0432\u0435\u0440\u043d\u0443\u0442\u044c \u043e\u0431\u0449\u0435\u0435 \u0445\u0440\u0430\u043d\u0438\u043b\u0438\u0449\u0435 \u0434\u043b\u044f \u0434\u0432\u0443\u0445 \u0441\u0435\u0440\u0432\u0435\u0440\u043e\u0432 \u043d\u0430 \u0431\u0430\u0437\u0435 \u0440\u0435\u0448\u0435\u043d\u0438\u0439 drbd+ocfs2. \u0414\u043b\u044f \u043a\u043e\u0433\u043e \u044d\u0442\u043e \u0431\u0443\u0434\u0435\u0442 \u043f\u043e\u043b\u0435\u0437\u043d\u043e: \u0422\u0443\u0442\u043e\u0440\u0438\u0430\u043b \u0441\u0442\u0430\u043d\u0435\u0442 \u043f\u043e\u043b\u0435\u0437\u0435\u043d \u0441\u0438\u0441\u0442\u0435\u043c\u043d\u044b\u043c \u0430\u0434\u043c\u0438\u043d\u0438\u0441\u0442\u0440\u0430\u0442\u043e\u0440\u0430\u043c \u0438 \u0432\u0441\u0435\u043c, \u043a\u0442\u043e \u0432\u044b\u0431\u0438\u0440\u0430\u0435\u0442 \u0441\u043f\u043e\u0441\u043e\u0431 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 \u0445\u0440\u0430\u043d\u0438\u043b\u0438\u0449\u0430 \u0438\u043b\u0438 \u0445\u043e\u0442\u044f\u0442 \u043f\u043e\u043f\u0440\u043e\u0431\u043e\u0432\u0430\u0442\u044c \u0440\u0435\u0448\u0435\u043d\u0438\u0435. \u041e\u0442 \u043a\u0430\u043a\u0438\u0445 \u0440\u0435\u0448\u0435\u043d\u0438\u0439 \u043c\u044b \u043e\u0442\u043a\u0430\u0437\u0430\u043b\u0438\u0441\u044c \u0438 \u043f\u043e\u0447\u0435\u043c\u0443 \u0427\u0430\u0441\u0442\u043e \u043c\u044b \u0441\u0442\u0430\u043b\u043a\u0438\u0432\u0430\u0435\u043c\u0441\u044f \u0441 \u0441\u0438\u0442\u0443\u0430\u0446\u0438\u0435\u0439, \u043a\u043e\u0433\u0434\u0430 \u043d\u0430\u043c \u043d\u0443\u0436\u043d\u043e \u0440\u0435\u0430\u043b\u0438\u0437\u043e\u0432\u0430\u0442\u044c \u043d\u0430 \u043d\u0435\u0431\u043e\u043b\u044c\u0448\u043e\u043c [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":22614,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-30623","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.0.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041e \u0447\u0435\u043c \u043c\u044b \u0440\u0430\u0441\u0441\u043a\u0430\u0436\u0435\u043c: \u041a\u0430\u043a \u0431\u044b\u0441\u0442\u0440\u043e \u0440\u0430\u0437\u0432\u0435\u0440\u043d\u0443\u0442\u044c \u043e\u0431\u0449\u0435\u0435 \u0445\u0440\u0430\u043d\u0438\u043b\u0438\u0449\u0435 \u0434\u043b\u044f \u0434\u0432\u0443\u0445 \u0441\u0435\u0440\u0432\u0435\u0440\u043e\u0432 \u043d\u0430 \u0431\u0430\u0437\u0435 \u0440\u0435\u0448\u0435\u043d\u0438\u0439 drbd+ocfs2. \u0414\u043b\u044f \u043a\u043e\u0433\u043e \u044d\u0442\u043e \u0431\u0443\u0434\u0435\u0442 \u043f\u043e\u043b\u0435\u0437\u043d\u043e: \u0422\u0443\u0442\u043e\u0440\u0438\u0430\u043b \u0441\u0442\u0430\u043d\u0435\u0442 \u043f\u043e\u043b\u0435\u0437\u0435\u043d \u0441\u0438\u0441\u0442\u0435\u043c\u043d\u044b\u043c \u0430\u0434\u043c\u0438\u043d\u0438\u0441\u0442\u0440\u0430\u0442\u043e\u0440\u0430\u043c \u0438 \u0432\u0441\u0435\u043c, \u043a\u0442\u043e \u0432\u044b\u0431\u0438\u0440\u0430\u0435\u0442 \u0441\u043f\u043e\u0441\u043e\u0431 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 \u0445\u0440\u0430\u043d\u0438\u043b\u0438\u0449\u0430 \u0438\u043b\u0438 \u0445\u043e\u0442\u044f\u0442 \u043f\u043e\u043f\u0440\u043e\u0431\u043e\u0432\u0430\u0442\u044c \u0440\u0435\u0448\u0435\u043d\u0438\u0435. \u041e\u0442 \u043a\u0430\u043a\u0438\u0445 \u0440\u0435\u0448\u0435\u043d\u0438\u0439 \u043c\u044b \u043e\u0442\u043a\u0430\u0437\u0430\u043b\u0438\u0441\u044c \u0438 \u043f\u043e\u0447\u0435\u043c\u0443 \u0427\u0430\u0441\u0442\u043e \u043c\u044b \u0441\u0442\u0430\u043b\u043a\u0438\u0432\u0430\u0435\u043c\u0441\u044f \u0441 \u0441\u0438\u0442\u0443\u0430\u0446\u0438\u0435\u0439, \u043a\u043e\u0433\u0434\u0430 \u043d\u0430\u043c \u043d\u0443\u0436\u043d\u043e \u0440\u0435\u0430\u043b\u0438\u0437\u043e\u0432\u0430\u0442\u044c \u043d\u0430 \u043d\u0435\u0431\u043e\u043b\u044c\u0448\u043e\u043c\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Yuri Gagarin\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/prohoster.info\/it\/blog\/administrirovanie\/klasternoe-hranilishhe-dlya-nebolshih-web-klasterov-na-baze-drbd-ocfs2\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 5.0.0.1\" \/>\n\t\t<meta property=\"og:locale\" content=\"it_IT\" \/>\n\t\t<meta property=\"og:site_name\" content=\"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"\ud83e\udd47\u041a\u043b\u0430\u0441\u0442\u0435\u0440\u043d\u043e\u0435 \u0445\u0440\u0430\u043d\u0438\u043b\u0438\u0449\u0435 \u0434\u043b\u044f \u043d\u0435\u0431\u043e\u043b\u044c\u0448\u0438\u0445 web-\u043a\u043b\u0430\u0441\u0442\u0435\u0440\u043e\u0432 \u043d\u0430 \u0431\u0430\u0437\u0435 drbd+ocfs2 | ProHoster\" \/>\n\t\t<meta property=\"og:description\" content=\"\u041e \u0447\u0435\u043c \u043c\u044b \u0440\u0430\u0441\u0441\u043a\u0430\u0436\u0435\u043c: \u041a\u0430\u043a \u0431\u044b\u0441\u0442\u0440\u043e \u0440\u0430\u0437\u0432\u0435\u0440\u043d\u0443\u0442\u044c \u043e\u0431\u0449\u0435\u0435 \u0445\u0440\u0430\u043d\u0438\u043b\u0438\u0449\u0435 \u0434\u043b\u044f \u0434\u0432\u0443\u0445 \u0441\u0435\u0440\u0432\u0435\u0440\u043e\u0432 \u043d\u0430 \u0431\u0430\u0437\u0435 \u0440\u0435\u0448\u0435\u043d\u0438\u0439 drbd+ocfs2. \u0414\u043b\u044f \u043a\u043e\u0433\u043e \u044d\u0442\u043e \u0431\u0443\u0434\u0435\u0442 \u043f\u043e\u043b\u0435\u0437\u043d\u043e: \u0422\u0443\u0442\u043e\u0440\u0438\u0430\u043b \u0441\u0442\u0430\u043d\u0435\u0442 \u043f\u043e\u043b\u0435\u0437\u0435\u043d \u0441\u0438\u0441\u0442\u0435\u043c\u043d\u044b\u043c \u0430\u0434\u043c\u0438\u043d\u0438\u0441\u0442\u0440\u0430\u0442\u043e\u0440\u0430\u043c \u0438 \u0432\u0441\u0435\u043c, \u043a\u0442\u043e \u0432\u044b\u0431\u0438\u0440\u0430\u0435\u0442 \u0441\u043f\u043e\u0441\u043e\u0431 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 \u0445\u0440\u0430\u043d\u0438\u043b\u0438\u0449\u0430 \u0438\u043b\u0438 \u0445\u043e\u0442\u044f\u0442 \u043f\u043e\u043f\u0440\u043e\u0431\u043e\u0432\u0430\u0442\u044c \u0440\u0435\u0448\u0435\u043d\u0438\u0435. \u041e\u0442 \u043a\u0430\u043a\u0438\u0445 \u0440\u0435\u0448\u0435\u043d\u0438\u0439 \u043c\u044b \u043e\u0442\u043a\u0430\u0437\u0430\u043b\u0438\u0441\u044c \u0438 \u043f\u043e\u0447\u0435\u043c\u0443 \u0427\u0430\u0441\u0442\u043e \u043c\u044b \u0441\u0442\u0430\u043b\u043a\u0438\u0432\u0430\u0435\u043c\u0441\u044f \u0441 \u0441\u0438\u0442\u0443\u0430\u0446\u0438\u0435\u0439, \u043a\u043e\u0433\u0434\u0430 \u043d\u0430\u043c \u043d\u0443\u0436\u043d\u043e \u0440\u0435\u0430\u043b\u0438\u0437\u043e\u0432\u0430\u0442\u044c \u043d\u0430 \u043d\u0435\u0431\u043e\u043b\u044c\u0448\u043e\u043c\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/prohoster.info\/it\/blog\/administrirovanie\/klasternoe-hranilishhe-dlya-nebolshih-web-klasterov-na-baze-drbd-ocfs2\" \/>\n\t\t<meta property=\"og:image\" content=\"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg\" \/>\n\t\t<meta property=\"og:image:secure_url\" content=\"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg\" \/>\n\t\t<meta property=\"og:image:width\" content=\"350\" \/>\n\t\t<meta property=\"og:image:height\" content=\"350\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2019-10-31T18:36:34+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2019-10-31T18:36:34+00:00\" \/>\n\t\t<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/prohoster\" \/>\n\t\t<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/prohoster\" \/>\n\t\t<!-- All in One SEO -->\n\n","aioseo_head_json":{"title":"\ud83e\udd47Storage cluster per piccoli web cluster basato su drbd+ocfs2 | ProHoster","description":"Di cosa parleremo: Come distribuire rapidamente uno storage condiviso per due server utilizzando soluzioni drbd+ocfs2. A chi sar\u00e0 utile: Questo tutorial sar\u00e0 utile agli amministratori di sistema e a chiunque stia scegliendo un modo per implementare lo storage o voglia provare questa soluzione. Da quali soluzioni ci siamo allontanati e perch\u00e9 Spesso ci troviamo nella situazione in cui dobbiamo implementare in un contesto ridotto.","canonical_url":"https:\/\/prohoster.info\/it\/blog\/administrirovanie\/klasternoe-hranilishhe-dlya-nebolshih-web-klasterov-na-baze-drbd-ocfs2","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"it_IT","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47\u041a\u043b\u0430\u0441\u0442\u0435\u0440\u043d\u043e\u0435 \u0445\u0440\u0430\u043d\u0438\u043b\u0438\u0449\u0435 \u0434\u043b\u044f \u043d\u0435\u0431\u043e\u043b\u044c\u0448\u0438\u0445 web-\u043a\u043b\u0430\u0441\u0442\u0435\u0440\u043e\u0432 \u043d\u0430 \u0431\u0430\u0437\u0435 drbd+ocfs2 | ProHoster","og:description":"\u041e \u0447\u0435\u043c \u043c\u044b \u0440\u0430\u0441\u0441\u043a\u0430\u0436\u0435\u043c: \u041a\u0430\u043a \u0431\u044b\u0441\u0442\u0440\u043e \u0440\u0430\u0437\u0432\u0435\u0440\u043d\u0443\u0442\u044c \u043e\u0431\u0449\u0435\u0435 \u0445\u0440\u0430\u043d\u0438\u043b\u0438\u0449\u0435 \u0434\u043b\u044f \u0434\u0432\u0443\u0445 \u0441\u0435\u0440\u0432\u0435\u0440\u043e\u0432 \u043d\u0430 \u0431\u0430\u0437\u0435 \u0440\u0435\u0448\u0435\u043d\u0438\u0439 drbd+ocfs2. \u0414\u043b\u044f \u043a\u043e\u0433\u043e \u044d\u0442\u043e \u0431\u0443\u0434\u0435\u0442 \u043f\u043e\u043b\u0435\u0437\u043d\u043e: \u0422\u0443\u0442\u043e\u0440\u0438\u0430\u043b \u0441\u0442\u0430\u043d\u0435\u0442 \u043f\u043e\u043b\u0435\u0437\u0435\u043d \u0441\u0438\u0441\u0442\u0435\u043c\u043d\u044b\u043c \u0430\u0434\u043c\u0438\u043d\u0438\u0441\u0442\u0440\u0430\u0442\u043e\u0440\u0430\u043c \u0438 \u0432\u0441\u0435\u043c, \u043a\u0442\u043e \u0432\u044b\u0431\u0438\u0440\u0430\u0435\u0442 \u0441\u043f\u043e\u0441\u043e\u0431 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 \u0445\u0440\u0430\u043d\u0438\u043b\u0438\u0449\u0430 \u0438\u043b\u0438 \u0445\u043e\u0442\u044f\u0442 \u043f\u043e\u043f\u0440\u043e\u0431\u043e\u0432\u0430\u0442\u044c \u0440\u0435\u0448\u0435\u043d\u0438\u0435. \u041e\u0442 \u043a\u0430\u043a\u0438\u0445 \u0440\u0435\u0448\u0435\u043d\u0438\u0439 \u043c\u044b \u043e\u0442\u043a\u0430\u0437\u0430\u043b\u0438\u0441\u044c \u0438 \u043f\u043e\u0447\u0435\u043c\u0443 \u0427\u0430\u0441\u0442\u043e \u043c\u044b \u0441\u0442\u0430\u043b\u043a\u0438\u0432\u0430\u0435\u043c\u0441\u044f \u0441 \u0441\u0438\u0442\u0443\u0430\u0446\u0438\u0435\u0439, \u043a\u043e\u0433\u0434\u0430 \u043d\u0430\u043c \u043d\u0443\u0436\u043d\u043e \u0440\u0435\u0430\u043b\u0438\u0437\u043e\u0432\u0430\u0442\u044c \u043d\u0430 \u043d\u0435\u0431\u043e\u043b\u044c\u0448\u043e\u043c","og:url":"https:\/\/prohoster.info\/it\/blog\/administrirovanie\/klasternoe-hranilishhe-dlya-nebolshih-web-klasterov-na-baze-drbd-ocfs2","og:image":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:secure_url":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:width":350,"og:image:height":350,"article:published_time":"2019-10-31T18:36:34+00:00","article:modified_time":"2019-10-31T18:36:34+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster","article:author":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":{"post_id":"30623","title":null,"description":null,"keywords":null,"keyphrases":null,"primary_term":null,"canonical_url":null,"og_title":null,"og_description":null,"og_object_type":"default","og_image_type":"default","og_image_url":null,"og_image_width":null,"og_image_height":null,"og_image_custom_url":null,"og_image_custom_fields":null,"og_video":null,"og_custom_url":null,"og_article_section":null,"og_article_tags":null,"twitter_use_og":false,"twitter_card":"default","twitter_image_type":"default","twitter_image_url":null,"twitter_image_custom_url":null,"twitter_image_custom_fields":null,"twitter_title":null,"twitter_description":null,"schema":{"blockGraphs":[],"customGraphs":[],"default":{"data":{"Article":[],"Course":[],"Dataset":[],"FAQPage":[],"Movie":[],"Person":[],"Product":[],"ProductReview":[],"Car":[],"Recipe":[],"Service":[],"SoftwareApplication":[],"WebPage":[]},"graphName":"","isEnabled":true},"graphs":[]},"schema_type":null,"schema_type_options":null,"pillar_content":false,"robots_default":true,"robots_noindex":false,"robots_noarchive":false,"robots_nosnippet":false,"robots_nofollow":false,"robots_noimageindex":false,"robots_noodp":false,"robots_notranslate":false,"robots_max_snippet":null,"robots_max_videopreview":null,"robots_max_imagepreview":"large","priority":null,"frequency":null,"local_seo":null,"seo_analyzer_scan_date":"2026-02-19 09:14:07","breadcrumb_settings":null,"limit_modified_date":false,"reviewed_by":null,"ai":null,"created":"2021-03-01 03:31:24","updated":"2026-02-19 09:14:07","focus_keyword":null,"additional_keywords":null,"truseo_locale":null},"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/posts\/30623","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/comments?post=30623"}],"version-history":[{"count":2,"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/posts\/30623\/revisions"}],"predecessor-version":[{"id":161788,"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/posts\/30623\/revisions\/161788"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/media\/22614"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/media?parent=30623"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/categories?post=30623"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/tags?post=30623"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}